Executrix of abraham s



(No Model.

A. S. KISSELL, Deod.

M. A. KISSELL, Executrix. BLEGTROMOTOR.

No. 411,150. Patented Sept. 17, 1889.

Wifhwaea, m fi/dwz/ W? M W UNITED STATES PATENT OFFICE.

MARY A. KISSEIIL, OF CHICAGO, ILLINOIS, EXECUTRIX OF ABRAHAM S. KIS-SELL, DECEASED.

ELECTROMOTOR.

SPECIFICATION forming part of Letters Patent No. 411,150, datedSeptember 17, 1889. Application filed April 1, 1889. Serial No. 305,617-(No model.)

To aZZ whom it may concern:

Be it known that ABRAHAM S. KIssELL, late of Chicago, Illinois, and acitizen of the United States, now deceased, did during his life-timemake certain new and useful Improvements in Electromotors, of which thefollowing is a specification.

The invention relates to that class of electromotors which are designedfor use where IO only a small amount of mechanical work is to beperformed, and is particularly adapted for the operation ofheat-controlling devices.

The invention consists, chiefly, in novel means for forming and breakingthe electrical circuits in which the motor is joined,so as to obtainintermittent motion therefrom. In its adaptation to the regulation ofheatsupplying devices it may be used in connection with a thermostat,whereby the elec- 2o trical circuits are automatically made and brokenaccording to variations of tempera- .ture, and this adaptation is chosenfor the purpose of describing the invention.

In the accompanying drawings, Figure l is a 2 5 plan view of the motor,thermostat, battery, and electrical connections; and Fig. 2 is a sideelevation, the wiring being merely indi cated.

In the drawings, A is the base of the machine, upon which are mountedvertical plates B B, which constitute the poles of the fieldmagnet, thelocation of which is indicated by the screws 1) Z).

O is a revolving armature of the Siemens type, having three coils.

D is the commutator, and (Z (Z the brushes thereof.

The shaft of the armature has a threaded extension D, meshing with aworm-wheel E,

0 secured upon a rotatable stud or spindle F, mounted in a bearingformed by a'bracket F, extended from the end plate of the pole-pieces BB. Mounted upon the upper surface of the worm-wheel is a disk G, ofinsulating ma- 5 terial, upon the periphery of which is secured anannular cam-plate H, whose upper surface is divided into two segments ofone hundred and eighty degrees each, with a uniform in cline and abruptend walls. It will be ob- 5o served that the insulating materialprojects above the lower end. of the inclines, so that only aboutone-half of the upper edge of the latter is made effective, ashereinafter described. Suitably secured upon a supportingplate I arecontacts J K L, the contact K having a bent end, which is maintainedcontinually in contact with the outer face of the cam-plate II. Thebinding-screw of said contact K will be connected by wire 7.; to thebrush 41, and a wire M leads from the brush d to the battery. Thecontacts J and L are connected by the wires j Z to the respective hotand cold sides of thermostat T, or other contact-making device, which isalso joined in circuit with the battery Y. Said contacts are made ofspring metal, and their inner ends ride upon the upper edge of thecamplate inclines. The thermostat, as usual with such devices, will havea pivoted needle vibrating between two contacts, and when brought totouch either the one or the other a current is established through themotor, and by means of the worm-gear rotates the spindle,which may beconnected, for example, with a damper adapted to be actuated thereby.This rotary movement continues so long as the contact which is in theelectrical circuit is in engagement with the metal of cam H; but whenthe worm-wheel has turned until said contact drops off at the end So ofthe incline upon the insulated disk G the circuit is broken, the motorstops, and the movement of the damper or other actuated mechanismceases. The same working cycle is performed upon the resumption of theeircuit by the operation of the thermostat, and thus intermittentmovement is imparted to any device with which the spindle is connected.

It will be observed that by means of the cam-plate and its describedcontacts the circuit is mechanically broken at each quarterrevolution ofthe cam-plate, and so, if the device be used with a thermostat, it isnot important that the needle of the latter shall be released fromcontact immediately. By means of this automatic cut-out device thebattery-power will only be expended in the accomplishment of usefulwork, and a small battery may be employed.

It may be found expedient to dispense with the battery, theelectro-motive force being threaded end, an annular plate mounted onsaid wheel, but insulated therefrom, a contact joined in themotor-circuit and adapted to bear constantly on said plate, the latterhaving an interrupted portion to provide cams, and a contact joined alsoin the motoreircuit and adapted to engage said cams intermittently tomake and break the motorcircuit, substantially as described.

MARY A. KISSELL, Executrioc of Abraham S. Kvlssell.

Witnesses:

T. D. BUT ER, FREDERICK O. GOODWIN.

